Enum AssistantMessageEvent 

pub enum AssistantMessageEvent {
    Start {
        partial: Arc<AssistantMessage>,
    },
    TextStart {
        content_index: usize,
        partial: Arc<AssistantMessage>,
    },
    TextDelta {
        content_index: usize,
        delta: String,
        partial: Arc<AssistantMessage>,
    },
    TextEnd {
        content_index: usize,
        content: String,
        partial: Arc<AssistantMessage>,
    },
    ThinkingStart {
        content_index: usize,
        partial: Arc<AssistantMessage>,
    },
    ThinkingDelta {
        content_index: usize,
        delta: String,
        partial: Arc<AssistantMessage>,
    },
    ThinkingEnd {
        content_index: usize,
        content: String,
        partial: Arc<AssistantMessage>,
    },
    ToolCallStart {
        content_index: usize,
        partial: Arc<AssistantMessage>,
    },
    ToolCallDelta {
        content_index: usize,
        delta: String,
        partial: Arc<AssistantMessage>,
    },
    ToolCallEnd {
        content_index: usize,
        tool_call: ToolCall,
        partial: Arc<AssistantMessage>,
    },
    Done {
        reason: DoneReason,
        message: AssistantMessage,
    },
    Error {
        reason: ErrorReason,
        error: AssistantMessage,
    },
}

AssistantMessageEvent tagged union, mirrors TS exactly.

Providers emit events in this order: Start is emitted once before any per-block events, then a {Start,Delta*,End} triple per content block (text / thinking / toolcall), then a terminal Done (carrying the final successful message) or Error (carrying a terminal message with StopReason::Error/Aborted).

Every non-terminal event references the in-progress AssistantMessage via partial so subscribers can render a live view. We wrap the partial in Arc so the event is cheap to clone across broadcast subscribers.

Variants

Start

Fields

partial: Arc<AssistantMessage>

TextStart

Fields

content_index: usize

partial: Arc<AssistantMessage>

TextDelta

Fields

content_index: usize

delta: String

partial: Arc<AssistantMessage>

TextEnd

Fields

content_index: usize

content: String

partial: Arc<AssistantMessage>

ThinkingStart

Fields

content_index: usize

partial: Arc<AssistantMessage>

ThinkingDelta

Fields

content_index: usize

delta: String

partial: Arc<AssistantMessage>

ThinkingEnd

Fields

content_index: usize

content: String

partial: Arc<AssistantMessage>

ToolCallStart

Fields

content_index: usize

partial: Arc<AssistantMessage>

ToolCallDelta

Fields

content_index: usize

delta: String

partial: Arc<AssistantMessage>

ToolCallEnd

Fields

content_index: usize

tool_call: ToolCall

partial: Arc<AssistantMessage>

Done

Fields

reason: DoneReason

message: AssistantMessage

Error

Fields

reason: ErrorReason

error: AssistantMessage

Implementations

impl AssistantMessageEvent

pub fn type_tag(&self) -> &'static str

Returns the type tag, mirroring the TS discriminator.

pub fn is_terminal(&self) -> bool

True for the two terminal variants.

pub fn partial(&self) -> &AssistantMessage

Snapshot of the partial message for live rendering. Terminal events do not carry a partial; returns the terminal message itself for Done/Error.

Trait Implementations

impl Clone for AssistantMessageEvent

fn clone(&self) -> AssistantMessageEvent

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AssistantMessageEvent

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for AssistantMessageEvent

fn eq(&self, other: &AssistantMessageEvent) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for AssistantMessageEvent

fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AssistantMessageEvent